Kwan Toh Tan, M.D.
Internal Medicine Physician · La Palma, CA
Kwan Toh Tan, M.D. is an internal medicine physician with a practice address in La Palma, California, and NPI 1013099746, issued on Oct 20, 2006. Check the license (California G74232, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Kwan Toh Tan
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G74232 CA
Self-reported in NPPES; status is on the state search - Practice location
- 7872 Walker St, La Palma, CA 90623
- Phone
- (714) 527-8777
- Enumerated
- Oct 20, 2006
- Record last updated
- Jul 7, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (714) 527-8990
- Medicaid IDs
- 00G742320 CA
GR0061200 CA
GR0061190 CA - Medicare enrollment
- Enrolled (PECOS I20111229000163); accepts Medicare assignment
- Medical or professional school
- Oral Roberts University School Of Medicine, 1990
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 7872 Walker St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Maggie HagaClinical Social Worker1427178367
- Joseph Hahn, D.D.SProsthodontics1366846610
- Jamie Hainlen, NPNurse Practitioner1730724741
- Judy Helbon, LCSWClinical Social Worker1942366513
- Chao Hung Kao, MSW, RN, FNP-CNurse Practitioner1629303698
- Caleb KilMedical Physician Assistant1699319848
Verify Kwan Toh Tan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G74232Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.7 times the Medicare Part D claims of the average internal medicine physician in 2024
8,723 Medicare Part D claims for 699 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 348 claims were for opioids.
Most prescribed
- Atorvastatin Calcium698 claims
- Losartan Potassium660 claims
- Amlodipine Besylate563 claims
- Metformin Hcl354 claims
- Hydrocodone-Acetaminophen217 claims
- Albuterol Sulfate Hfa209 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $3,880.61
94 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Joshua International Medical GroupLa Palma, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Kwan Toh Tan among 17,696 internal medicine physician records in California
Kwan Toh Tan, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1990 · median 2004 among the 11,065 with a school on file
- Record last updated2016 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
13 internal medicine physician records list a practice address in La Palma
They are 13 of the 593 NPPES records with a practice address in La Palma, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in La Palma → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Xiao-Ying Fang, M.D.La Palma, CA 906231295972842
- Shaheen Iqbal, M.D.La Palma, CA 906231366514499
- Edward Jang, M.D.La Palma, CA 906231790966992
- Jongjin Kim, M.D.La Palma, CA 906231356605836
- Curtis Lee, MDLa Palma, CA 906231467498428
- Andrew Mui, M.D.La Palma, CA 906231992135826
- Mahendra Patel, M.D.La Palma, CA 906231841376738
- Richard Ruth, M.D.La Palma, CA 906231700804986
Common questions
What is Kwan Toh Tan, M.D.'s NPI number?
Kwan Toh Tan, M.D.'s National Provider Identifier (NPI) is 1013099746, issued on Oct 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Kwan Toh Tan, M.D. located?
The NPPES record lists a practice address at 7872 Walker St, La Palma, CA, 90623. Phone: (714) 527-8777. Providers update this record themselves, so call before visiting.
How can I verify Kwan Toh Tan, M.D.'s license?
NPPES lists California license number G74232, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Kwan Toh Tan, M.D. prescribe under Medicare Part D?
In 2024, Kwan Toh Tan, M.D. had 8,723 Medicare Part D claims for 699 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.